Any experience with Bluechart G3 maps and Fenix 6 series?

Aloha Garmin community! I just ordered the Quatix 6 after much research and it should be arriving in about a week. This will be my first Garmin device but not my first Multisport/Smartwatch. I have been using Suunto devices for the last 10 years and they have been on a steady decline in my opinion. My last device Suunto 9 Baro just never hit the mark nor app expectations. I am a professional sailor as well as a long distance voyager and live aboard a vessel based out of the Hawaiian islands. I do believe the Quatix 6 after much research is the device for me. I have some questions I would like to find some answers for.
  1. Has anyone used Bluecharts G3 with their Garmin watch? If yes, what is your impression of the G3 marine maps (detail, usability etc.)?
  2. Does anyone have a preferred “wind app” they find reliable?
  3. Best radar/weather app?
  4. Will the software on Fenix 6/Quatix 6 measure diving depth (freedive/snorkeling)?
  5. Can you mark POI's on G3 marine maps?                                             
    Much Māhalo and hoping my transition over to Garmin was a smart one!